Based on the Mindlin-Reissner plate theory, a new 4-nodes plate bending element with ac-cureately integrated stiffness matrix has been derived through a new isoparametric transformation of a quadrilateral parent element together with the associated shape function.

The parent element of TPME was divided into several regions,with each region having its own material; and the cavity in the element was treated as a special kind of material.

(4) Scientific visualization is studied systemically. A new method for plotting colored patterns of finite element results called SPEM (Scan Parent Element Method) is described.

A parent element is evenly divided into sub\|rectangles or sub\|triangles, and then a horizontal line is used to scan the vertices of the sub\|regions one by one.

After an isosceles right triangular parent element in rectangular coordinate system is subdivided into N 2 sub-triangles,the mapping sub-triangles on the screen are filled with colors calculated according to the central temperatures of them.

The significance for the need for accurate, highly sensitive analyses for the materials is discussed in the context of quality control of end products containing the parent element in each material.

Since the parent element decays through two isomeric states of the daughter, the ratio of the total mass of technetium per millicurie of99mTc is a function of the time elapsed between two consecutive elutions.

We compared the criteria and sub-criteria according to their relative importance with respect to the parent element in the adjacent upper level.

The representation of the solution on each element is actually formulated on this parent element.

The set of Condition elements denotes the parent element as being conditionally selected upon the truth of the Boolean combination of predicate tests.

It is well known that automatic discretization of a structure in FEM contains:1. automatic generation of nodal point coordinates;2. numbering of nodal points;3. numbering of elements.In this paper, the concept of mapping in iso-parametric elements is adopted to generate the nodal point coordinates of the mesh. First of all, the structure is divided properly into several parts according to the profile of its cross-section. For each part an appropriate parent element is selected and its nodal locations in...

It is well known that automatic discretization of a structure in FEM contains:1. automatic generation of nodal point coordinates;2. numbering of nodal points;3. numbering of elements.In this paper, the concept of mapping in iso-parametric elements is adopted to generate the nodal point coordinates of the mesh. First of all, the structure is divided properly into several parts according to the profile of its cross-section. For each part an appropriate parent element is selected and its nodal locations in global coordinate system are chosen for interpolation. Then, by the following equationsthe coordinates of any nodal point in mesh may be obtained from its local coordinates(ξ ,η ,ζ ) given.In general, the numbering of nodal points is a troublesome task in programming. In consideration of the storage capacity of a computer, the Front Solver is adopted in solution of the simultaneous equations. The aim is twofold: first, the Front Solver itself requires much less storage than ordinary bandwidth solver; secondly, it is unnecessary to keep the order of nodal point numbers in continuous sequence, i. e. "dummy" nodal points are allowable which make the programming much easier and simpler.In numbering of nodal points and elements, the author presents a so-called "Chessboard" mesh in which the elements are arranged in a more regular form, so that the order of numbers of nodal points and elements can be exhibited more intuitively.This method has been applied in mesh generation of 2- and 3-dimensional structures such as disks and turbine blades, the results confirm adequate accuracy of the nodal point coordinates at the boundary and less effort in preparation of input data. Finally, when the mesh has to be altered or refined, all we need do is to change several controlling parameters.

So far no definite parent elements and interpolation matrix are presented for many isoparametric elements, (e. g. triangular and tetrahedral elements) except for regular rectangle and hexahedron elements, since the local coordinates adopted for their shape functions are not proper. This situation is improved in this paper by using a proper local coordinate. So all the curved isoparametric elements will have their definite parent element in the local coordinate. A unified method...

So far no definite parent elements and interpolation matrix are presented for many isoparametric elements, (e. g. triangular and tetrahedral elements) except for regular rectangle and hexahedron elements, since the local coordinates adopted for their shape functions are not proper. This situation is improved in this paper by using a proper local coordinate. So all the curved isoparametric elements will have their definite parent element in the local coordinate. A unified method is presented here to generate the interpolation matrix and perform the numerical integrations for them. It's benificial to the accuracy and the automation of the mesh generation.

This paper studied the problems when determining the multiple-elements in the samples of soils, rocks and sediments of the water system using ICP-AES method, the interference of parent elements in the samples to the spectrum for the determination of the trace elements. The correction method of combination of artificial parent matching and the correction factors of spectrum interference were adopted in this paper.Approach have been taken place on the preparation of the standard, the selection...

This paper studied the problems when determining the multiple-elements in the samples of soils, rocks and sediments of the water system using ICP-AES method, the interference of parent elements in the samples to the spectrum for the determination of the trace elements. The correction method of combination of artificial parent matching and the correction factors of spectrum interference were adopted in this paper.Approach have been taken place on the preparation of the standard, the selection of the correction factors and the longterm stability of the correction factors. Finally, the analysis method presented by this paper has been used for the determination of great amount of samples of the key projects in national 7th 5 years plan and 8th 5 years plan and reliable data were gained. The research and establishment of this correction method let many trace elements of very difficult to be determined, all got very satisfied results.